When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve -7a + 6a = 8a - z - 7 for a in terms of z.
| -1\(\frac{1}{3}\)z - \(\frac{4}{9}\) | |
| 3\(\frac{1}{2}\)z - \(\frac{1}{4}\) | |
| \(\frac{7}{15}\)z + \(\frac{7}{15}\) | |
| 1\(\frac{1}{4}\)z - 1\(\frac{1}{2}\) |